200-liter TNS inner coated steel drum and its packaging application

200-liter TNS inner coated steel drum and its packaging application

Text / You Fuyuan

I. Introduction

The 200-liter steel drum is a widely used metal packaging container in China's petroleum, food, chemical and forestry systems. It is often used as a large-scale loading and packaging container for the export of China's petroleum and chemical raw materials. The corrosion resistance of 200-liter ordinary steel drums is poor, which seriously affects the export tasks of emulsion pesticides and turpentine.

The TNS coating researched and developed by Sichuan Tainuosi New Material Technology Co., Ltd. is a new type of packaging protective material with very good corrosion resistance. Our factory has applied TNS electrostatic spraying technology and successfully produced 200-liter TNS-coated steel drums with the 200-liter oil-drum special steel plate of the third steel plant of Shanghai Iron and Steel Company, which solved the quality problems of export product packaging and created a favorable prospect for export product packaging.

2. Production process of 200-liter TNS-coated steel drums

The production process flow of our factory 200-liter TNS-coated steel drum is shown in Figure 1.

Figure 1 Flow chart of 200L TNS coated steel drum production process

3. Performance of TNS coating

After the TNS coating is formed into a film, the appearance is smooth and smooth, without wrinkle skin and no shedding phenomenon. Through physical, chemical, corrosion and sanitary toxicology tests, it is confirmed that the TNS coating has outstanding weather resistance, aging resistance, chemical corrosion resistance, damp heat, salt fog, and mold resistance. At the same time, the TNS coating has strong adhesion, high bending resistance, high impact strength and high temperature resistance. Table 1 shows the TNS coating properties.

Table 1 TNS coating properties

Numbering

project name

Reference standard or test method

result

1

thickness

GB 1764

80μm

2

hardness

Pencil hardness method

4H or more

3

Cold bend

D = 0, B = 50mm, 180 °

qualified

4

Adhesion

GB 1720

Level 1

5

Impact strength

GB 1732

50kg · cm

6

Weather resistance

Artificial rainfall simulation at 50 ℃, 1000 hours of xenon lamp irradiation

No obvious change in appearance

7

Heat resistance

Holding at 180 ℃ for 100 hours, continuous boiling in boiling water for 880 hours

No bubbles on the surface

8

Abrasion resistance

Manually spin with 50 pebbles or iron chains for 10 minutes

No flaking and scratches on the coating

9

Damp heat resistance test

GB 2423.4

No change in surface

10

Salt spray test

GB 2423.17

Good surface

11

Mold test

GB 2423.16

qualified

12

Hygienic toxicology test

White oil and TNS-soaked white oil to feed mice

Non-toxic, no abnormal

13

Chemical resistance test

TNS coating film sample soaked in 50% sulfuric acid for 5 days

No shedding and no rust

4. Application and economic benefits of 200-liter TNS coated steel drum packaging

The 200-liter TNS-coated steel drums have been widely used in honey, turpentine, spice oil, methamidophos, jinggangmycin, dimethoate, silicone, dibutyl phthalate and other foods after being packaged by some units nationwide. , Pesticides, spices and chemical raw materials on metal packaging containers. Some applications are summarized in Table 2.

Table 2 200L TNS coated steel drum packaging application examples

Application unit

Quantity (only)

Packaged goods name

effect

A chemical plant in the Ministry of Chemical Industry

5000

Silicone

good

A solvent plant in Nanchang

3000

Dibutyl phthalate

good

A pesticide factory in Shanghai

1000

Jinggangmycin, malathion, etc.

good

A pesticide plant in Jiangxi

500

Methamidophos

good

A pesticide factory in Guangdong

500

Jinggangmycin etc.

good

A pesticide factory in Jiangsu

500

Rice blast

good

A pesticide factory in Zhejiang

500

Jinggangmycin, glucoamylase, etc.

good

A chemical plant in Jiangxi

500

turpentine

good

Various solvents loaded in 200-liter TNS-coated steel drums have the characteristics of long storage period and stable quality before and after loading, and are especially suitable for long-distance transportation of exported products. For turpentine, a forest chemical product with strong corrosive permeability, TNS steel drums, PVF inner coated steel drums and galvanized steel drums are packaged and stored for 2 to 3 months of comparative spot-check test. The above-mentioned three steel drums were spot-checked for 5 each. The spot-check situation is shown in Table 3. The results of random inspection show that the application of TNS steel drum packaging is good, no corrosion, no rust, and no change in the quality of turpentine. Its corrosion resistance and packaging effect are much better than traditional PVF steel drums and galvanized steel drums.

Table 3 Results of spot checks on 200-liter TNS steel drums, PVF steel drums and galvanized steel drums

Packaged goods name

Shelf life

TNS steel barrel

Traditional PVF steel drum

Galvanized steel barrel

turpentine

70 days

No change

All slightly rusted

1 barrel lightly corroded

turpentine

90 days

No change

All are slightly corroded, one barrel of rust is slightly serious

2 barrels mildly corroded

The 200-liter TNS-coated steel drums have good corrosion resistance and significant packaging application effects, which not only solves the problems of metal packaging containers such as food, pesticides, spices and chemical raw materials, but also solves the problems of foreign products due to corrosion in foreign trade exports. Increased zinc, lead, iron, product deterioration, degradation and other issues. The use of 200 liters of TNS-coated steel drums to package exported products has improved the quality of the exported products, and the foreign exchange income of more than 600,000 US dollars has been increased for the country based on the export of more than 250 tons of pesticides. The export of turpentine to the UK, as a result of the application of 200-liter TNS-coated steel drums, guarantees the grade of the exported product, which increases by $ 100 per ton of turpentine. Obviously, 200-liter TNS-coated steel drums have brought greater economic benefits to foreign trade exports in the packaging of exported products.
Not only that, compared with traditional PVF coatings, TNS coatings also have the following advantages:

1. No smoke in construction: thoroughly solve the problem of serious smoke and odor during the construction of PVF inner coating on the market;

2. Energy saving and environmental protection: To solve the problem of excessively high temperature requirements of PVF coatings on the market, resulting in energy waste; the curing condition of this product is 230 ℃ for 10 ~ 12 minutes;

3. Large spray area: spray more than 5.5 200L steel drums per kg of paint;

4. Safety: This product is a non-hazardous chemical product, which completely solves the transportation problem and facilitates the legal and compliant storage of steel drum manufacturers.

5. Compared with similar coatings, the price is cheaper and the cost performance is higher.

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